diff --git a/tests/basics/deque1.py b/tests/basics/deque1.py
new file mode 100644
index 000000000..ee51516b5
--- /dev/null
+++ b/tests/basics/deque1.py
@@ -0,0 +1,47 @@
+try:
+    try:
+        from ucollections import deque
+    except ImportError:
+        from collections import deque
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+
+d = deque((), 2)
+print(len(d))
+print(bool(d))
+
+try:
+    d.popleft()
+except IndexError:
+    print("IndexError")
+
+print(d.append(1))
+print(len(d))
+print(bool(d))
+print(d.popleft())
+print(len(d))
+
+d.append(2)
+print(d.popleft())
+
+d.append(3)
+d.append(4)
+print(len(d))
+print(d.popleft(), d.popleft())
+try:
+    d.popleft()
+except IndexError:
+    print("IndexError")
+
+d.append(5)
+d.append(6)
+d.append(7)
+print(len(d))
+print(d.popleft(), d.popleft())
+print(len(d))
+try:
+    d.popleft()
+except IndexError:
+    print("IndexError")
diff --git a/tests/basics/deque2.py b/tests/basics/deque2.py
new file mode 100644
index 000000000..22d370e94
--- /dev/null
+++ b/tests/basics/deque2.py
@@ -0,0 +1,66 @@
+# Tests for deques with "check overflow" flag and other extensions
+# wrt to CPython.
+try:
+    try:
+        from ucollections import deque
+    except ImportError:
+        from collections import deque
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+
+# Initial sequence is not supported
+try:
+    deque([1, 2, 3], 10)
+except ValueError:
+    print("ValueError")
+
+# Not even empty list, only empty tuple
+try:
+    deque([], 10)
+except ValueError:
+    print("ValueError")
+
+# Only fixed-size deques are supported, so length arg is mandatory
+try:
+    deque(())
+except TypeError:
+    print("TypeError")
+
+d = deque((), 2, True)
+
+try:
+    d.popleft()
+except IndexError:
+    print("IndexError")
+
+print(d.append(1))
+print(d.popleft())
+
+d.append(2)
+print(d.popleft())
+
+d.append(3)
+d.append(4)
+print(d.popleft(), d.popleft())
+try:
+    d.popleft()
+except IndexError as e:
+    print(repr(e))
+
+d.append(5)
+d.append(6)
+print(len(d))
+try:
+    d.append(7)
+except IndexError as e:
+    print(repr(e))
+print(len(d))
+
+print(d.popleft(), d.popleft())
+print(len(d))
+try:
+    d.popleft()
+except IndexError as e:
+    print(repr(e))
diff --git a/tests/basics/deque2.py.exp b/tests/basics/deque2.py.exp
new file mode 100644
index 000000000..3df8acf40
--- /dev/null
+++ b/tests/basics/deque2.py.exp
@@ -0,0 +1,15 @@
+ValueError
+ValueError
+TypeError
+IndexError
+None
+1
+2
+3 4
+IndexError('empty',)
+2
+IndexError('full',)
+2
+5 6
+0
+IndexError('empty',)